Mathematical View of AoB

rgrlee71 · 12-19-08, 06:25 PM

Hi,

I am a noob to submarine sims as a whole (sh4 is my first). I am however versed at trig, but wasn't understanding "where" the AoB was coming from. I kept thinking that the bow of your sub was taken into account and that somehow intersected your targets heading to create the angle. It seems that, in these forums, that the AoB comes up a lot and even the video tutorials don't explain where the angle really comes from. So I spent a few minutes in the Nav map and came up with a visual representation of "what" the AoB really is. I turned on autotargeting to see what the angle the computer set for the target, then used the drawing tools to map it out.

Many of you probably know this, but for those who don't and may want to plot it here are the images.

1) With the compass and protractor you can see that if you draw your normal target course line and a line from the center of your sub to the center of your target, the intersecting angles are about 22 degrees.

2) This image is what the auto-targeting computed.

So, incase there are those that are confused about where this angle comes from, you now have a graphical representation of AoB.

XLjedi · 12-19-08, 07:07 PM

I drew these last year to help explain AoB, perhaps they might be useful here...

Just a quick (and mathematical) way to calculate AoB if you know your sub course is on a 90° beam to the target true course.

Now you shouldn't need the auto-target to compute it.

rgrlee71 · 12-19-08, 07:25 PM

aaronblood,

Thanks for the addition. I'm just starting to do manual targeting, but I plan on leaving contact updates on. It's fun playing with the plotting tools to find the angles, makes it a little more immersive, even if the auto-updating is semi-cheating

XLjedi · 12-20-08, 02:24 PM

Quote:

Originally Posted by rgrlee71

...It's fun playing with the plotting tools to find the angles, makes it a little more immersive...

If you like the math, graphing, and so forth, you might like using the electronic maneuvering board that I used. It's free you know.

Rockin Robbins · 12-20-08, 02:47 PM

Quote:

Originally Posted by aaronblood

Quote:

Originally Posted by rgrlee71

...It's fun playing with the plotting tools to find the angles, makes it a little more immersive...

If you like the math, graphing, and so forth, you might like using the electronic maneuvering board that I used. It's free you know.

Sheesh aaronblood, you can't bring yourself to promote your brainchild to save your own life!

OK, guys, his program is MoBo: the electronic maneuvering board and Christmas cookie maker. You got me, I made up the part about the cookies, but it's almost that good. Now here's how you do it.

The Link

Now quit being so darn modest and get these people some help!

XLjedi · 12-20-08, 04:23 PM

Actually, I'm just sneaky...

SteamWake · 12-19-08, 07:50 PM

Quote:

Originally Posted by aaronblood

I drew these last year to help explain AoB, perhaps they might be useful here...

Just a quick (and mathematical) way to calculate AoB if you know your sub course is on a 90° beam to the target true course.

Now you shouldn't need the auto-target to compute it.

Thats some nice stuff right there... nice job !

I'm goin' down · 12-20-08, 03:26 AM

excellent graphical representation. (I make my son wear a copy pasted to his forehead, so I am sure not to forget it.) the AOB concept is important to understand on a theoretical level and these examples make understanding it quite easy. it goes hand in hand with Hitman's tutorial on manual targeting, and makes attacking with the SCAF mod much easier to understand.

Nisgeis · 12-20-08, 03:50 AM

If you want to know conceptually what the AoB is, then think of yourself standing on the bow of the ship you are targetting. Look to port or starboard until you can see the attacking submarine. That relative bearing to the submarine is the ship's AoB.

I have seen AoB poorly explained, because they use very simplified set ups that give you the impression that the AoB is something that it is not, by using examples of only 'ship due east of you sailing towards you at AoB 0' and 'ship sailing due west away at AoB of 180'.

Hope that helps you visualise what it is you are working out.

cleverusername · 12-20-08, 09:46 AM

AOB is basically your position relative to the target ship. Or, pretend you're on target ship and you're looking at ownship. What is its bearing? That's AOB.

12-19-08, 06:25 PM	#1
rgrlee71 Swabbie Join Date: Dec 2008 Posts: 5 Downloads: 35 Uploads: 0	Mathematical View of AoB Hi, I am a noob to submarine sims as a whole (sh4 is my first). I am however versed at trig, but wasn't understanding "where" the AoB was coming from. I kept thinking that the bow of your sub was taken into account and that somehow intersected your targets heading to create the angle. It seems that, in these forums, that the AoB comes up a lot and even the video tutorials don't explain where the angle really comes from. So I spent a few minutes in the Nav map and came up with a visual representation of "what" the AoB really is. I turned on autotargeting to see what the angle the computer set for the target, then used the drawing tools to map it out. Many of you probably know this, but for those who don't and may want to plot it here are the images. 1) With the compass and protractor you can see that if you draw your normal target course line and a line from the center of your sub to the center of your target, the intersecting angles are about 22 degrees. 2) This image is what the auto-targeting computed. So, incase there are those that are confused about where this angle comes from, you now have a graphical representation of AoB.

12-19-08, 07:07 PM	#2
XLjedi Ace of the Deep Join Date: Jun 2005 Location: Palm Beach, Florida Posts: 1,243 Downloads: 53 Uploads: 8	I drew these last year to help explain AoB, perhaps they might be useful here... Just a quick (and mathematical) way to calculate AoB if you know your sub course is on a 90° beam to the target true course. Now you shouldn't need the auto-target to compute it. __________________ Last edited by XLjedi; 12-19-08 at 07:14 PM.

12-20-08, 04:23 PM	#6
XLjedi Ace of the Deep Join Date: Jun 2005 Location: Palm Beach, Florida Posts: 1,243 Downloads: 53 Uploads: 8	Actually, I'm just sneaky... __________________

12-20-08, 03:26 AM	#8
I'm goin' down Ocean Warrior Join Date: Sep 2008 Location: Notify command we have entered the Grass Sea Posts: 2,822 Downloads: 813 Uploads: 0	very nice excellent graphical representation. (I make my son wear a copy pasted to his forehead, so I am sure not to forget it.) the AOB concept is important to understand on a theoretical level and these examples make understanding it quite easy. it goes hand in hand with Hitman's tutorial on manual targeting, and makes attacking with the SCAF mod much easier to understand.

12-20-08, 03:50 AM	#9
Nisgeis Ocean Warrior Join Date: Jan 2008 Posts: 2,909 Downloads: 77 Uploads: 11	If you want to know conceptually what the AoB is, then think of yourself standing on the bow of the ship you are targetting. Look to port or starboard until you can see the attacking submarine. That relative bearing to the submarine is the ship's AoB. I have seen AoB poorly explained, because they use very simplified set ups that give you the impression that the AoB is something that it is not, by using examples of only 'ship due east of you sailing towards you at AoB 0' and 'ship sailing due west away at AoB of 180'. Hope that helps you visualise what it is you are working out. __________________ -------------------------------- This space left intentionally blank.

12-19-08, 07:25 PM	#3
rgrlee71 Swabbie Join Date: Dec 2008 Posts: 5 Downloads: 35 Uploads: 0	aaronblood, Thanks for the addition. I'm just starting to do manual targeting, but I plan on leaving contact updates on. It's fun playing with the plotting tools to find the angles, makes it a little more immersive, even if the auto-updating is semi-cheating

12-20-08, 09:46 AM	#10
cleverusername Seaman Join Date: Jan 2006 Location: Durham, NC Posts: 38 Downloads: 0 Uploads: 0	AOB is basically your position relative to the target ship. Or, pretend you're on target ship and you're looking at ownship. What is its bearing? That's AOB. __________________ Visual. Tally. Press! Last edited by cleverusername; 12-20-08 at 09:46 AM.